Rhif Archif
6199537
Disgrifiad
Penrhyn Slate Quarry Water Balance Lift; photo survey comprising four black and white photographs taken by D.J. Percival, 2002
Enw Casgliad
Investigators' Photographs
Cyfrwng
Photo.
Cychwynnwr
David J. Percival, RCAHMW
Dyddiad
2002-05